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Fan F.-Y.,Tsinghua University | Gao P.,Institute of Physical and Chemical Engineering of Nuclear Industry | Jiang T.,Institute of Physical and Chemical Engineering of Nuclear Industry
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | Year: 2012

The technology of laser absorption spectroscopy was used for real-time monitoring of gadolinium atom vapor concentration measurement and the solid state laser pumped ring dye laser was used as optical source. The optical fiber was taken to improve the stability of laser transmission. The multi-pass absorption technology combined with reference optical signal avoided the influence of laser power fluctuation. The experiment result shows that the system based on this detection method has a standard error of 4%. It is proved that the monitoring system provides reliable data for atom vapor laser isotope separation process and the separation efficiency can be improved. Source


Xie Q.,Institute of Physical and Chemical Engineering of Nuclear Industry | Cong Y.,Institute of Physical and Chemical Engineering of Nuclear Industry | Wu J.,Institute of Physical and Chemical Engineering of Nuclear Industry
He Jishu/Nuclear Techniques | Year: 2010

A mathematical model is established for the quasi-ideal cascade with an additional feed flow. A numerical calculation method to solve the cascade equation was presented and analytical solution of the cascade equation was obtained. Analytical expressions are given for calculating the relative product and waste flows, the total substance flow, and the component concentrations in the product and waste flows. Calculations for the enrichment of recycled uranium are carried out by using the model of quasi-ideal cascade, in which the natural uranium is supplied as a base feed flow while the recycled is supplied as an additional one. Source


Xie Q.-X.,Institute of Physical and Chemical Engineering of Nuclear Industry | Mou H.,Institute of Physical and Chemical Engineering of Nuclear Industry | Wu J.-J.,Institute of Physical and Chemical Engineering of Nuclear Industry
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | Year: 2012

It is a constraint multi-parameter optimization problem to determine cascade configuration parameters such as the distribution of the stage entering flows, the total number of stages and the position of feed flow on the condition that the concentrations of a target component in the product and waste flows are given. Using penalty function method, the constraint optimization problem was transformed into an unconstraint one, which was solved by the simplex method. The optimization method was applied to calculate the cascade in which the recycled uranium is enriched. The results show that the optimization method is convergent. Source


Xie Q.-X.,Institute of Physical and Chemical Engineering of Nuclear Industry | Geng B.-S.,Institute of Physical and Chemical Engineering of Nuclear Industry | Wu J.-J.,Institute of Physical and Chemical Engineering of Nuclear Industry
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | Year: 2011

The most effective cascade scheme for the enrichment of recycled uranium is the cascade with an additional flow, in which the natural uranium is supplied as a base feed flow and the recycled as an additional feed flow. Based on particularities in the enrichment of recycled uranium, an approximate calculation method of M cascade for the enrichment of recycled uranium was presented. Numerical calculations indicate that the results obtained by using the approximate method and the engineering optimization method are very approach, and the maximum relative error is less than 0.1%. But compared with the engineering optimization method, the approximate method is more simple, convenience and faster. Source


Xie Q.-X.,Institute of Physical and Chemical Engineering of Nuclear Industry | Li W.-B.,Institute of Physical and Chemical Engineering of Nuclear Industry | Wu J.-J.,Institute of Physical and Chemical Engineering of Nuclear Industry | Cong Y.-K.,Institute of Physical and Chemical Engineering of Nuclear Industry
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | Year: 2010

A stationary calculation method was proposed for calculating multicomponent square cascades with additional flows. The method is based on the quasi-linearization of cascade governing equations. A successive approximation of the cascade separation factor was used to accelerate the convergence process. Numerical calculations indicate that the results obtained by using the stationary method and transient method are consistent, however the stationary method can reduce computational time substantially compared with the transient one, and so it is suitable for calculating square cascades with additional flows or more complex cascades such as square-off cascade. Source

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